Network · AS25163

AS25163 21 st Century Technologies Limited

AS25163 (21 st Century Technologies Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS25163

Owner21 st Century Technologies Limited
KindInternet service provider
Servers, not peopleno
IPv4 addresses4,608
IPv4 ranges2
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

80.248.0.0/20
41.222.150.0/23

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-22.

Check an IP address →

Detect it in code

Spot AS25163 traffic at signup.

Send the visitor's IP. The response includes the ASN, the owner and flags.hosting.

curl https://veqen-app.com/v1/ip/check \
  -H "Authorization: Bearer $VEQEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"ip": "203.0.113.7"}'

import os, requests

r = requests.post(
    "https://veqen-app.com/v1/ip/check",
    headers={"Authorization": f"Bearer {os.environ['VEQEN_API_KEY']}"},
    json={"ip": "203.0.113.7"},
    timeout=10,
)
result = r.json()
print(result["risk"]["verdict"], result["risk"]["reasons"])

const res = await fetch("https://veqen-app.com/v1/ip/check", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.VEQEN_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({"ip": "203.0.113.7"}),
});
const result = await res.json();
console.log(result.risk.verdict, result.risk.reasons);

Questions

About AS25163

Is AS25163 a datacenter or VPN network?

AS25163 (21 st Century Technologies Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS25163?

AS25163 is registered to 21 st Century Technologies Limited. It announces about 4,608 IPv4 addresses.

How do I detect traffic from AS25163?

Call the Veqen IP check with the visitor's address. The response includes the ASN, the owner and whether the network is a datacenter, VPN network, relay or ISP.